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Within the OBD-II (On-Board Diagnostics) system, codes starting with "B" generally refer to system issues, as opposed to "P" for Powertrain or "U" for Network communication. The B1D9F11 is a manufacturer-specific code for Land Rover and Jaguar vehicles. It specifically indicates a Ground Fault and is often accompanied by the technical description: "Engine speed input - short circuit to ground". land rover b1d9f11 2021
The amplifier is failing to receive a clear engine speed (crank signal) input. Sub-fault Code -11: Specifically denotes a "Short to Ground". Typically, there are no noticeable symptoms This public link is valid for 7 days
Land Rover amplifiers (typically located under the seats or in the rear cargo area) are susceptible to water damage if a sunroof drain clogs or a rear window seal fails. Moisture can create a short across the pins. Can’t copy the link right now
The dashboard displays a warning message.